U-7194 Tire size question

[Bobbert]

I just purchased my Diablo 7194 yesterday for my newbody 4.8L silverado.

I replaced my factory 245/70/17 tires/wheels with 275/55/20 avalanche take off's.

I tried to change for this on the diablo, uploaded the tune. Drove about 3-4 miles and the abs light and parking brake light come on. I read in the manual that the new GM pcm can't accept a tire size height of over 35in or it will disable the abs system, well I go into the diablo, and it's sitting on 36in. I change it down, save, go back and it's on 36 again.

No matter what I do for tire input, after I save it and go back and look at it it doesn't change, it stays at 36. Also where you can put in the tire size, aspect ratio, wheel size. I change those, they do the same thing, they won't save my input values.

Can somebody lend me a hand? Thanks.

In case it's needed:
07 Silverado NBS 4.8L 2wd Regcab
VIN: 1gcec14c67z559095

[MattD]

You forgot to tell them how much more power it had over the Blunt Revolution.

[Bobbert]

Yeah you're right, I did!

I had a Evolution by that "other" company. Man does it suck comapred to the Diablo, holy crap at the difference! I was shocked and blown away, didn't think I'd feel THAT much of a difference between the two but I sure as hell did.

[mikel]

Make sure the Predator is on the newest revision, there was an older rev. that did not adjust tire size correctly.

Thanks

[Bobbert]

Matt updated it right before we installed it, so I was sure it wasn't that.

However Saturday we updated again and now it works great, so the issue is resolved. Thanks